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Finding the Fourth Proportional to 917,611.12, 1,375,887.48 and 355,989.52

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Solution

The fourth proportional to 917,611.12, 1,375,887.48 and 355,989.52 is: 533,778.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,611.12 : 1,375,887.48 = 355,989.52 : x
  2. Step 2: Convert to fraction form
    917,611.12/1,375,887.48 = 355,989.52/x
  3. Step 3: Cross multiply
    917,611.12x = 1,375,887.48 × 355,989.52
  4. Step 4: Simplify right side
    917,611.12x = 489,801,523,579.21
  5. Step 5: Solve for x
    x = 489,801,523,579.21/917,611.12
  6. Step 6: Final answer
    x = 533,778.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.